1 /*
2  * Copyright (C) 2011 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.modelviewer;
18 
19 import android.renderscript.Matrix4f;
20 import android.renderscript.RSSurfaceView;
21 import android.renderscript.RenderScriptGL;
22 
23 import android.content.Context;
24 import android.hardware.Sensor;
25 import android.hardware.SensorEvent;
26 import android.hardware.SensorEventListener;
27 import android.hardware.SensorManager;
28 import android.view.MotionEvent;
29 import android.view.SurfaceHolder;
30 import android.view.ScaleGestureDetector;
31 import android.util.Log;
32 
33 public class SimpleModelView extends RSSurfaceView implements SensorEventListener {
34 
35     private RenderScriptGL mRS;
36     private SimpleModelRS mRender;
37 
38     private ScaleGestureDetector mScaleDetector;
39 
40     private SensorManager mSensorManager;
41     private Sensor mRotationVectorSensor;
42     private final float[] mRotationMatrix = new float[16];
43 
44     private static final int INVALID_POINTER_ID = -1;
45     private int mActivePointerId = INVALID_POINTER_ID;
46     private boolean mUseSensor = false;
47     private Matrix4f mIdentityMatrix = new Matrix4f();
48 
SimpleModelView(Context context)49     public SimpleModelView(Context context) {
50         super(context);
51         ensureRenderScript();
52         mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
53         // Get an instance of the SensorManager
54         mSensorManager = (SensorManager)getContext().getSystemService(Context.SENSOR_SERVICE);
55         // find the rotation-vector sensor
56         mRotationVectorSensor = mSensorManager.getDefaultSensor(
57                 Sensor.TYPE_ROTATION_VECTOR);
58         mIdentityMatrix.loadIdentity();
59     }
60 
ensureRenderScript()61     private void ensureRenderScript() {
62         if (mRS == null) {
63             RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
64             sc.setDepth(16, 24);
65             mRS = createRenderScriptGL(sc);
66             mRender = new SimpleModelRS();
67             mRender.init(mRS, getResources());
68         }
69     }
70 
71     @Override
resume()72     public void resume() {
73         mSensorManager.registerListener(this, mRotationVectorSensor, 10000);
74     }
75 
76     @Override
pause()77     public void pause() {
78         mSensorManager.unregisterListener(this);
79     }
80 
81     @Override
onAttachedToWindow()82     protected void onAttachedToWindow() {
83         super.onAttachedToWindow();
84         ensureRenderScript();
85     }
86 
87     @Override
surfaceChanged(SurfaceHolder holder, int format, int w, int h)88     public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
89         super.surfaceChanged(holder, format, w, h);
90         mRender.surfaceChanged();
91     }
92 
93     @Override
onDetachedFromWindow()94     protected void onDetachedFromWindow() {
95         mRender = null;
96         if (mRS != null) {
97             mRS = null;
98             destroyRenderScriptGL();
99         }
100     }
101 
loadA3DFile(String path)102     public void loadA3DFile(String path) {
103         mRender.loadA3DFile(path);
104     }
105 
106     @Override
onTouchEvent(MotionEvent ev)107     public boolean onTouchEvent(MotionEvent ev) {
108         mScaleDetector.onTouchEvent(ev);
109 
110         boolean ret = false;
111         float x = ev.getX();
112         float y = ev.getY();
113 
114         final int action = ev.getAction();
115 
116         switch (action & MotionEvent.ACTION_MASK) {
117         case MotionEvent.ACTION_DOWN: {
118             mRender.onActionDown(x, y);
119             mActivePointerId = ev.getPointerId(0);
120             ret = true;
121             break;
122         }
123         case MotionEvent.ACTION_MOVE: {
124             if (!mScaleDetector.isInProgress()) {
125                 mRender.onActionMove(x, y);
126             }
127             mRender.onActionDown(x, y);
128             ret = true;
129             break;
130         }
131 
132         case MotionEvent.ACTION_UP: {
133             mActivePointerId = INVALID_POINTER_ID;
134             break;
135         }
136 
137         case MotionEvent.ACTION_CANCEL: {
138             mActivePointerId = INVALID_POINTER_ID;
139             break;
140         }
141 
142         case MotionEvent.ACTION_POINTER_UP: {
143             final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK)
144                     >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
145             final int pointerId = ev.getPointerId(pointerIndex);
146             if (pointerId == mActivePointerId) {
147                 // This was our active pointer going up. Choose a new
148                 // active pointer and adjust accordingly.
149                 final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
150                 x = ev.getX(newPointerIndex);
151                 y = ev.getY(newPointerIndex);
152                 mRender.onActionDown(x, y);
153                 mActivePointerId = ev.getPointerId(newPointerIndex);
154             }
155             break;
156         }
157         }
158 
159         return ret;
160     }
161 
162     private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
163         @Override
onScale(ScaleGestureDetector detector)164         public boolean onScale(ScaleGestureDetector detector) {
165             mRender.onActionScale(detector.getScaleFactor());
166             return true;
167         }
168     }
169 
onSensorChanged(SensorEvent event)170     public void onSensorChanged(SensorEvent event) {
171         // we received a sensor event. it is a good practice to check
172         // that we received the proper event
173         if (mUseSensor) {
174             if (event.sensor.getType() == Sensor.TYPE_ROTATION_VECTOR) {
175                 // convert the rotation-vector to a 4x4 matrix. the matrix
176                 // is interpreted by Open GL as the inverse of the
177                 // rotation-vector, which is what we want.
178                 SensorManager.getRotationMatrixFromVector(
179                         mRotationMatrix , event.values);
180 
181                 if (mRender != null) {
182                     mRender.onPostureChanged(new Matrix4f(mRotationMatrix));
183                 }
184             }
185         }
186     }
187 
onAccuracyChanged(Sensor sensor, int accuracy)188     public void onAccuracyChanged(Sensor sensor, int accuracy) {
189     }
190 
toggleSensor()191     public void toggleSensor() {
192         mUseSensor = !mUseSensor;
193         if (mUseSensor == false) {
194             mRender.onPostureChanged(mIdentityMatrix);
195         }
196     }
197 }
198